She may not give you her personal email, but if she works for a group or agency there may be a work email. I would just reiterate that emails can cause more anxiety than you'd expect since a response is never guaranteed, as Stopdog pointed out.

I don't get the rigid no-hug thing either so longs as it's within the socially acceptable range of how most people outside therapy perceive them. For many people a hug is simply a greeting or gesture of friendliness and usually not much more.

I suppose if put it in the context of her having a hugging "policy", she may say no. But if you just tell her that for you, a hug once in a while a hug is comforting, I'd think it would be hard to say no to that.